Question

a can do piece of work in 15 days while b can do it in 10 days. how long it will they take together to do it?

Answer 1

Answer:

6 days

Step-by-step explanation:

In 15 days A do a piece of work.

In 1 days A can piece of work=1/15

In 10 days B do that work.

In 1days B can do that work=1/10

If they will work A and B together=1/15+1/10

=5/30

=6 days